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(Cascading Style Sheets) CSS 2.1 Reference

Integer Values

Integers do not contain a decimal point and are comprised of one or more of the following numbers: 0 thru 9. Example: 132. A plus sign (+) or minus sign (-) can precede the integer to indicate the sign of the number. Example: -36.

Some properties may restrict integer values. There may be property values, for example, that only allow positive integers.